There has been past discussions on execution speed between Python 2 and 3 where 3 is notably slower in most cases. It was suggested there were improvements in 3.6, but as I could not figure out how to get 3.6 installed and running I could not check that out. With your instructions I can.

My simplistic integer test on a Pi 3B showed about the same increase in execution time for 3.4.2 and 3.6.0, both taking 73% longer to run than 2.7.9 -

I will be honest and say that I think that raspbian needs to have an update for the base install of python from 3.4.2 (current) to atleast 3.6.0, preferably 3.6.2

I would like to be able to write code for python 3.6 so that people can be able to use the program on any platform with out having to go though the process of building python 3.6 from source especially when they have never used Linux before etc. I have stopped developing on the rpi due to this which is sad really.

I would like to be able to write code for python 3.6 so that people can be able to use the program on any platform with out having to go though the process of building python 3.6 from source

The usual approach is to target code for the lowest version one can, then most users can run that regardless of what version they have.

Unless the code uses some feature only available in a later version it shouldn't generally present problems. With a little bit of effort it is usually possible to write code which runs on both Python 2.7 and 3.x

I will be honest and say that I think that raspbian needs to have an update for the base install of python from 3.4.2 (current) to atleast 3.6.0, preferably 3.6.2

I would like to be able to write code for python 3.6 so that people can be able to use the program on any platform with out having to go though the process of building python 3.6 from source especially when they have never used Linux before etc. I have stopped developing on the rpi due to this which is sad really.

Raspbian follows Debian Stretch ARMHF, for the RPF to offer a newer package would mean hours of testing for compatibility, time and money which could be better spent on the fulfilling of the Charitable Aims.

If you want latest and greatest a Rolling Release like Arch should suffice, which offers Python 3.6.2 already.